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ultrashort — [ul΄trəshôrt′] adj. very short; specif., designating or of radio waves shorter than 10 meters in wavelength and above 30 megahertz in frequency … English World dictionary

ultrashort — 1. adjective a) Extremely short in duration, typically on the femtosecond scale an ultrashort pulse b) Having a wavelength of between 1 and 10 metree an ultrashort bond See Also … Wiktionary

Ultrashort pulse — In optics, an ultrashort pulse of light is an electromagnetic pulse whose time duration is on the order of the femtosecond (10 − 15 second). Such pulses have a broadband optical spectrum, and can be created by mode locked oscillators. They are… … Wikipedia